Developer docs · InboxRatio Editorial
SparkPost email API: SDKs, docs and limits (2026)
Every link below points into SparkPost's official developer documentation and was checked on 10 September 2026. We record only what the vendor documents — a field we could not verify at the source is left out, never guessed.
From SparkPost's official docs · checked 10 September 2026
Docs, SDKs and limits
- Developer docs
- developers.sparkpost.com/
- API reference
- developers.sparkpost.com/api/
- SDK languages
- ElixirGoJavaNode.jsPHPPythonAs listed in SparkPost's official SDK docs
- SMTP relay
- Yes · SMTP docs
- Webhooks
- Webhook docs
From our feature matrix — documented by the vendor
API, SMTP and sending auth
- APIREST API: Transmissions, Templates, Metrics, Events, Subaccounts, Inbound Domains and more
- SDKs / client libraries'several official and community supported client libraries' (e.g. SparkPost/node-sparkpost, python-sparkpost, php-sparkpost on GitHub)
- Public API docsPublic API reference at developers.sparkpost.com (still served, HTTP 200)
- Webhooks'Batches of events are delivered through a POST request'; retried for 8 hours
- SMTP APISMTP injection with X-MSYS-API header for campaign, metadata, tags, IP pool
- SMTP relay'Host smtp.sparkpostmail.com', ports 587/2525, AUTH LOGIN with API key, STARTTLS
- Transactional emailTransmissions API for transactional sending; sparkpost.com now 301s to bird.com/products/email
- SPF assistanceBounce-domain CNAME verification; legacy SparkPost SPF FAQ now 301s to Bird guide where return-path CNAME gives SPF alignment
- DKIM setup'A valid DKIM record must be in the DNS for the sending domain'
- DMARC supportNot in SparkPost API docs; legacy SparkPost DKIM/SPF/DMARC FAQ URL now serves Bird guide requiring a DMARC record
Features checked 10 September 2026. ✓ documented · ◐ limited or plan-gated · × documented as absent · — not documented. Documentation is not a measured result — see our methodology.
Generated from our datasets — every value verified and dated
Frequently asked questions
Where are the official SparkPost API docs?
SparkPost's official developer documentation is at https://developers.sparkpost.com/, and the API reference is at https://developers.sparkpost.com/api/. Links checked on 10 September 2026.
Does SparkPost have an SDK for Python?
Yes. Python is among the SDK languages listed in SparkPost's official docs: Elixir, Go, Java, Node.js, PHP and Python (checked 10 September 2026).
Does SparkPost support SMTP relay?
Yes. SparkPost's official docs document SMTP relay sending: https://developers.sparkpost.com/api/smtp/ (checked 10 September 2026).
Does SparkPost offer webhooks?
Yes. SparkPost's official docs cover webhook event notifications: https://developers.sparkpost.com/api/webhooks/ (checked 10 September 2026).